> For callbacks that are allowed to call C again one would have to use a
> self-expanding global array instead of *once-to-c-closure-callback* and pass
> the index into the array where the closure is saved to the C function as
> well.
In case the C code receives another callback and wants to call both of them
interchangingly, one would have to use the array solution as well.
Viele Grüße
Bruno Daniel